Driven drum power terminal



Feb. 6, 1951 J. D. CHRISTIAN 2,540,099

DRIVEN DRUM POWER TERMINAL Filed May 4, 1949 4 Sheets-Sheet 1 INVENTOR.Joseph 0 Chr/sf/an AMI! Feb. 6, 1951 J. D. CHRISTIAN DRIVEN DRUM POWERTERMINAL n 2 \w R w t 5% 0% N MW 55f W n R mm mm Q ,0 mm m h m Q mw h mP 6 4 m Q M w m J A Mm A WW ll m 1 m O n, R ll Q Q l \m mm 3 sm Q H 7 Wn. m mm m .w. MN fi k m 7 Q Q Q M Q Q 9. mm wm MM I Q4. mw mm w v N 4, Q

ww V .l m w ww & M \w a F a F z Feb. 6, 1951 J. D. CHRISTIAN DRIVEN DRUMPOWER TERMINAL 4 SheetsSheet 3 Filed May 4, 1949 Adi 4 INVEN 702 JosephD. Chr/sfian BY w 4' ATTOQN $55 -mdE Feb. 6, 1951 J, cH s A 2,540,099

DRIVEN DRUM POWER TERMINAL Filed May 4, 1949 4 Sheets-Sheet 4 FlE'zl EiINVENTOQ. ./056,0/7 D. Chris/Am ATTORNE Patented Feb. 6, 1951 UNITEDSTATES PATENT OFFICE DRIVEN DRUM POWER TERMINAL Joseph D. Christian, SanFrancisco, Calif.

Application May 4, 1949, Serial No. 91,291

20 Claims. 1 This invention relates to a driven drum power terminal inwhich the driving means, including a prime mover and a reduction geardevice, are enclosed within the drum which inturn provides a powertake-01f.

Many conveyor drives are provided by a flexible conveyor device such asa belt or several chains or cables trained about a driven pulley orsprocket pair at one end and about an idler 'pulley or sprocket pair atthe other end. The driven pulley or sprocket pair is usually mounted ona suitably journalled shaft which is in turn driven by an independentprime mover through an independent but intermediate speed change device,such as a gear reducer or an arrangement of belts and pulleys or gearsand sprockets. Such installations take up considerable space and requirethe careful alignment of the various separate and inv can be mounted inany one of a plurality of drums dependent components; necessarily, theyare exceedingly heavy, initially expensive and costly to maintain.

In accordance with this invention, I provide a unitary power terminalstructure in which the driven element provides a container for the primemover and the speed change device the structure need only be mounted ona suitable foundation and supplied with power to be ready for use,

Thus, the entire structure is self-contained and can be installed andutilized as a unit in any desired location. More particularly, theunitary power terminal structure of this invention includes a suitablebase on which the driven drum is mounted for rotation. Within the drumare mounted the prime mover and the speed change device for driving thedrum at a desired speed; the prime mover and the speed change device arefixed and do not rotate although they assist in providing rotationalsupport for the drum. It is also contemplated that the drum can bedriven by an external prime mover in the event the drumcontained primemover should fail.

One of theobjects of the present invention is to provide a driven drumin which the driving mechanism, including the prime mover, is enclosedwithin the drum, making for compactness and simplicity of installation.7

Another object of the invention is to drive a drum by a contained primemover, as an electric motor, and a train of gears arranged to drive thedrum at a desired speed from the drum-contained prime mover.

A further object is to provide in such a device, design features makingfor simple assembly and disassembly in case. of necessary repairs,together with the possibility of driving by external means in case thecontained prime mover should fail.

A still further object is to provide a device of this type which consitutes a packaged power unit suited to many specifically differentapplications merelyby slight changes int-he surfaceoi the transverselyof the drum, entering at one end of the drum and issuing from the otherend of the drum, so that adequate cooling 'for the speed change deviceand for the prime mover is provided. v v I Another object of the presentinvention is to provide adriven drum unit in which the'drivingmechanism, including a prime mover and a speed change deviceis enclosedin the drum in such a fashion that air circulation can takeplacecompletely through the drum.

Another object of the present invention is to provide a self-containeddriven drum device in which the prime mover and speed change device ofdifferentsizes. r

A further object of the present invention is to provide a driven drumdevice of the character described in which thedriving connection to thedrum from the prime mover speed change unit is through a flexibleconnection so that a simple and inexpensive form of drum, suchas onemade of a length of rolled' steelboilr plate, can be employed. i

The invention includes other objects and features of advantage, someofwhich, together with the foregoing, will appear hereinafter whereinthe present preferred form ofthed'evice of this invention is disclosed.

In the drawing, Figure'l is a horizontal section of the device whereincertain parts are shown in plan.

Figure 2 is a vertical section of the device shown in Figure l in whichcertain parts are in elevation.

Figure 3 is an end view of a modified form of the invention, part beingbroken away.

Figure 4 is a section taken along the line 4-4 of Figure 3.

Figure 5 is a sectional detail view of the lubrication fitting. v

Figure 6 is a vertical section through a'ihodified form of a packagedpower terminal embodying the present invention. I v

The device which is the subject of this invention may be, and hereinwill be, described specifically as applied to a driven drum,specifically a smooth face drum intendedto operate as the drivingterminal of a'wide belt conveyor. However, the outer surface of the drummay take any one of several configurations. It maybe only a flat pulleyas is hereinafter described, or the surface may be grooved for" theordinary multiple V, belt and used as a source of power; the drum chainhiti 24:includes:.a disc.-I5;.secured .byscrews G l-to in- :terionannular. flange 66 provided intermediate in this instancean.ele.ctr-ic.motor extends be- --fiexible-coupling,--or any other-'deviceto. connect bell 55 to maintain theproper air-gap relation 7between themotonrotorandlstator. .Theprime w Imoveris-.supportedconcentrically withrespect to ---The speed -chan'gedevice;.2 includes. upper. and I lower casing members 56 and 51securedtogether andis open for ventilationon'lyat the motor end .by.means of a spider type construction'of the endwall 22. In this form,endjwall 22 is provided on the :member 65 and-in the outer drurnwall 23to:support rotatablythis.end of thedrun'n.

the Y speed. change deviceewhereby onecan be =-roundinglshaft 9 is. a.tubular extension I l-formed ---integrally with plate .15... and.inwhich .shaft 9 In the drawings and particularly in Figures 1, 2 and3, the three major elements of the device are indicated as prime moverI, a speed change d'eviceaioriigearbox 'Zg' ahd' theouter drum r 3, thewhole being"munted between arms 28 7 which are in turn supported from asuitable unitary base 69. As has been indicatedg' 'the 15.; prime moverI and speed change. device-2.. are fixed non-rotatably within the'rota'tably'supported drum. The drum includes aneouter cy- .10; lindricalshell two end walls 22. and 23, and an intermediate wall 24. Walls22af1d '23 are provided by circular discs GI secured :byaSClGWS B2 toannular flanges 63 on the drum ends. Wall the drum ends.

ofthe .drum...-..--Shaft..-.6 from. the..prirne mover,

:yond the adjacentarm 28 .to permit .oflconnec- -tionto -an-external.prime.mover,.if this be de- I sired; -In ordento-utilizethis,therern'eedbeonly secured to this shafhak pulley, .sprocketwheel,;,.,

this shaft toasuitable source, .of power, whereupon thedrumlmaybedrivenasdesired... Shaft Gissupported bynbearing-min end be'll531landby another bearing (not shown) in the. other end the-drumlay-hearings.2fll-and 5.at one endof the motor shaftand hy bearing:Ihsupportirig. the

other. endof the motor 'shaftin wall 24. m

bythreaded'rods 58-.and nuts 59-. Positioned between the casingmembersfifi. andxfil. and .fixedly secured to these is'amember .65 havinganexten- =sion 1 thereon which is'inhturn secured to the other arm 28 bya key 29-. .Bearing 8. is mounted V The member is'preferabl hollowed outton-admit J :of certainmec-hanismwi-th which thisinvention I :isnotconcernedyan open end-on the member is .5

closed by cap I0.

ingastonguatlh fitting into a..groove..2I in one rable connectionbetween the primemover and removed without disturbing thetother. Sur-J.

is mounted for rotationlbyzbearings I6. and I 8.5;

e5 ings I9 in the-speed-change devicelcasing. The

countershaft *61 also carries .2. gear I2 which is J .l enmeshed-with agear -.I 3 on the tubular extension I4. -In the fornr-of' thedeviceshown, .the.severa1.;..';.-f.

sion- I4-so that the-drumis driven at a: speed les :than that of theprim -mover; an xdesiredg", speed change can be-='provided so thatLdrum3 is I or the speed change device2 may. separately be 4 the prime moverpower take-off shaft 5 is taken off coaxially with the shaft, the torqueon the prime mover is reduced to a minimum and it is net's-necessary toemploy "azsheavy; internally braced prime mover.

"case theprime mover fails or additional power is -.required, asupplemental prime mover can be attached readily toathe extending end ofshaft 6. .The internal .arrange ment. and. the. speed change provided bygear box 2 between the prime mover and the drum canbearranged andadapted to any. given requirements.

' The drum walls 22, Hand 24 areseparable, as has been indicated,sothat, either the motor I removed for, any. purpose, withoutdisturbing, the

other, To, remove themotor, for exampleiit is only, necessary tosupport, the rum, ta ea y the right .hand. bracket 28, open -wall 22jand jpu1l themotor out this can be achievedwithout dis- .turloing. thespeed ,changefunit. In li'kef fashion,

the speed. change device. can 'be taken out for repairfreplacement or.change of. gears without fthe' additional necessity of disconnecting;the flange I5 from the center wall 24.

Each of wals 22, 23'; and 24 areapertured as at 25,. to permit forcedair circulationthrough the drum tomaintain the-prime mover; andthe-speed change device at a suitable-operating tempera- .ture. .Tofacilitate such circulation, air impeller blades 26 are mounted on motorshaft Band, with deflector 30, serve to establish and; to maintain apositive air movement through the drum.

.; i'In Figu'resfijand 4, I show a terminal fm'odified from that shownin Figures 1' and 2 i n that the drumjisclosed at thespeed change deviceend,

with'a plurality of spaced and inwardlyv extendingearsAI securedby'studs 42'to flange 43 on thedrum. As appears in Figure 4, theend'wall .22 and flange 43 are within the. confines of the drum so thatforeign materialjand .water' can enter only. with difiiculty. 1Additionally; the

shroud. 39 ,is so formed as to. establish aircircu lation in at the toprear of the motor, through the motor shell, and out;atthebottomfrpntpart 'of the motor. are provided in'each' endgwall- 22 and23.

..A novel lubricationfitting, best ,shownj'ip Fig- ,u'res 2. and 5, isprovided for, the speedchange .device... This'fitting includes a tube 3I; .passing Access openings with covers 25a through -a drilled opening.in bracket 28am tensionl. and.v into the .lower' casing member 51 .ofthe speed change device ,2 and screwedinto a threaded receptacle in thebottom'portion of the .speed change device. The lower end of thptube:threadedonto thecap 134,, and breatherports 36 and .,31 are. formed inthe cap,.,..which;encloses gears area arrangedto-provid e..s'eed=.reduction mefiltenmaterial suclras cotton wastepr steeliwoolbetween the: prime moverishaft .6. and the exten-q;

or the like.- .(Figure 5) The cap and dip rod may be removed, and theoil level in the gearbox determined by inspection 'of therod, oilbeing.admittedto the tube 3I the tube 3I. To drain the gearbox, a tube ispassed through an end wall opening and is screwed into the drain 38;upon unscrewing the tube 3I, the oil can be removed and replaced.

In that form of the invention shown in Figure 6 an outer driven drum,generally indicated by numeral I01, is provided and is driven by anelec- ,tric motor I08 through a speed change device generally indicatedat I09.

Drum I0'I includes opposite end walls III and H2, the former beingmounted for rotation upon tapered roller bearings I I4 and the latterbeing supported for rotation about bearing II6 as will presently appear.Bearing I I4 is supported upon a first tubular extension I I! whilebearing H6 is mounted upon a second extension II8, which aren'turn'jfixedly supported in brackets II9 carried by a suitable base(not shown). The drum walls III and"II2 are joined together with throughbolts I2I each wall s also formed with a circular flange I22 thereon,the bolts I2I retaining a shell I23 I in J position to provide a powertake-off meansjl lshell 7 I23 can be in drum form or it can' be asprocket or gear or other suitable power take-off means carr ed by or inengagement with the shell.

The prime mover includes a housing I3I of which extension III is anintegral portion. In the electric motor shown is mounted within aeffective to cause an air circulation through the device, the air isdrawn in through aperture I82 in fan I9I andejected by the fan along theline of the stator I 3I around housing I09 andout through apertures I8I.

To permit ready lubrication of the speed change devicej' a removableplug I33 is provided in an upper portion of the side wall l'dl, accessto this being, gained through one of the apertures I8I. A drainconnection I86 and a sight glass'IBI are provided [upon a lower portionof the speed change'device I09 so that'the oil level can beasc'eitained' and the oil changed when desired by removing a plug I38 inthe connection I86.

The foregoing device is relatively rugged and yet is exceedingly simple.to assemble and maintain; it contains relatively few bearings. The

f sizeof the outer steel drum I23 can be readily variedby changing thesize of walls II I and H2 and b selecting another size of cylindricalsteel J shell I23; the throughbolts I2I enable. the 'end walls III andH2 to be drawn tightly'into enlggagement with the drum ends. Q'I 'his"engagement is increased by screws I94 on walls III and I I2 [and whichare screwed into engagement with the drum ends after the through boltsare tightened.

'Ihe through bolts and screws are preferably stator I32 the housing I3Iand a rotor I33 is mounted upon motor shaft I34, the latterbeing carriedin the bearing I36 in end bell I 31 on cas 'ng I3I and in a bearing I33which is carried in an end wall I39 on the speed change device I09.Leads I40 extend from the motor through the tubular extension II'I.

The speed change device I09. includes end wall I93. a generally tubularside wall MI and another end wall I42; end wall I39 includes the tubularextension IIB thereon which extends from end ,wa'l I39, past end wallI42 for fixed support by bracket II9, as has been previously described;the end of tubular extension I I8 is closed by cap I60. End wall I39includes a flange I50 thereon and which fits within motor casing I3Itoflwhich it is secured by studs I55. The motor and the speed changeunit can thus be made up, tested and handled as a suit.

, staggered about the drum periphery, eight of each in each wall usuallysufficing. Connection is made between the speed change device and thewall 5 I2 merely by making up the connection between'the flexib ecoupling and the wall. The end brackets II9 employed to support the unit{can be of any size or can bejlocated upon any 35 desired fixed support.

' compactness of the design is such that I am able to provide a standard5-horsepower motor and an adequate reduction gear in a pulley of 2-inchdiameter andv 22-inch length, maximum imension in any direction of 30inches, whereas comparable installation such as described above involvessuch overall dimensions as 70 by 35, 42

I by 46,1ar'1d 54 by 46, all dimensions in inches. This: compactnessserves well in many situations,

Suitable speed changemechanism is included vice shown this includes apinion I5I mounted in the speed change device I09 and in the deupon themotor shaft I 34 and fitting in a relieved portion of the coaxialtubular extension II8"and in driving engagement with a gear I52 mountedupon a countershaft '53; the latter is carried by bearings I54 and I55,mounted respectively in end wall I39 and end wall M2.v Anothergear I51is carried by the countershaft I53 and is in driving engagement with agear I58. jGear I 58 I is formed on one end of a sleeveIfii which iscoaxial with the extension IIB andwhich is supas in mine tunn ls,conveyors for objects which overhang thebelt and would be interferedwith by machine elements projecting abovethesurfacejof the puley, etc.The entire unit can be moved'into position readily for it can be rolledalong a supporting surface like a drum or a bar- ,rel; this reducestransportation and installation As will be" apparent, the electric motoris exv emp'lary" only, inasmuch as any other form of primejmover maybeemployed, for example, a

' v gasoline engine, thef uel and exhaust being supported onone end by atapered roller bearing I62,

provided between the gear I58 and the extension IIB. At its other end,the sleeve "EI is joined by studs I63 to a coupling member I54, thelatter being supported by a tapered .roller bearing. IIS on, extension II8,.a suitable seal I68 being..pro-

videdto protect the hearing I I6. Afiexible'drivingconnection isprovided by studs I?! [which extend from a flange I12 on the couplingmember I64 through rubber bushings I'I3 provided in wall 2 I2.

To permit ready air circulation, a plurality of apertures ISI areprovided in wall I.I2, w l ile apertur'es I82 are 'provided inj iivalljH l. iricliidesafa'n I9I rotating ir'r' 'aTho:

and'taken away in a manner similar to providing electric current to thetors willsu'ffice' in most installations. The de- .yice may be'jused asa cable drum, or alternatively as a winch, or by mounting on a verticalaxis be used; as a cathead, the configuration of the drum being properlymade. r

The speed change unit, I09 is readilyassem- .bled, wall I39 beingsecured by spacedstuds I93 to'l'jside wall ,I4I. The motor andspeed'c'hange i un'it carijbeassemjblied and tested as a unit; when itis desired to complete the structure this unit is placed withinajsuitable drum. The driving Iconnection between the drum and speed unitcan be made by any type of flexible coupling.

1 ,Itii's believed apparent that the various objectsreferredwhereinabote naye been'obtainedih the bearing mounting thesecondend wall on the nii e fs'ionjlthe' ,fir'sit and the second ex- Afirs .afif h' j sec b rinf si r'umf'be g coaxial 'With' the'primejlriover "the'prim'e mover drive heft;

. e-q@ i 2e.q th character de ibes a b arin H v c mem rer in lu n laj avi di tensnnjthezfi H t 'd tension thereon and a driveshaftf peed d gi1n'it, i nclnding a casing having fa second tension' theredn'ymeansfixedly supporting the t! i t and thesecond extensions; a dr l m having'sh'attfla. w i, t t cond'fendjweilljaifirst" .movle il'drive sha l tmoun ing th' firstendWaII on the go q ecr' on 5 tension; the first andthe second exv the ,first .,a d, the second bearingsfand trie d1 inbingfcoax ieljwith the, prirne' 'rf1over s'h'a ft; at first gear onthe'fprime mov' drive tjia; f'second gear coaxiei with 'th v er driveshafta ndrotatabie aboutse ension; a fie'xibleconne'ction between the s;end geer and the second driim end vvali conn ct'ing said second gear tothe drum to" d1'ive t drum; 2. third hearing supportingthefsecond f' t g"on the secondfextensionyend g'earing'con- "ne cting the first gear andthe second gear to e drive thesecond gear' from the first gear. jln ejdevice' of the ch aracter described; a. mover inch ding I a casing"having e, ;fi1st ension "thereon ,and a drive shaft? aj'fs'peed ge iunit2 including a casing having fa second nsi'on jther'e'on'; means fixedlysupporting the fi t fia nd'theflsecond extensions; 21 drnm 'ving firstieind l af second end wall; a first h tiring hunting the first endjwail on' the firs t extens a} j'second bearing mounting "the second I.end wfagil on the second extensionfthe first and thesecond extensions,the first and thejsecond bearings and the drum being COZXiaIiVith the pmeffrnover shaft; a; first gear on theprime moi/er drive shaft; 3,second gear coa'xial 'vvith t "priine lnover' drive shaft; af thirdbearing pp n'gsaidfsecond gear on seidsecon'd exe nsion; meansconnecting said second gear to thedrfim to drive the drum; said secondbearing Qporting'said connecting means on s 'ei d second ex tension; andgearing connecting thefirst semiarid"- thej seco'nd gear to drive thesecond m n (sigh; e,

"gee frorrrthe firstg'ear.

-- fdeviceof thepharacter described; a qem e emever i luding? ca nhaving a r te sionth ereonendje;drive sh'agft; a speed c ange mm ea n dls r d t the r n ern'oveif casing and having a first ends-all supportingthifprime mover shaft and having a second e'eggtension thereon; meansfixedlyfsuppo 11g the ,'fir' st and the second extensions; a druniheving a; first and a second end"vvatil; a firsthe'e'rir ig'mountingthefirst end well on the HI fi' extension; "af second bearingmounting} the LT se ondf'e n'd waii'on' the second extensionf the first"and? the second extensions, the first and the H y r I ,v secgindbearingsand the drum b;irig coexialwith andtheseCOfidfiXtehsiions; rig c first'tjheprim'e mover shaft; a first gear 'on'theprime ,and als'efcond'end.,a1'1;j; a t bearin jmounting mover drive shaft; a second gearcoaxiaifwith cond 5 the n' over drjve shaftie.tubule ektem to drive"them-11m; and ,jgearin 'nn first gear. and the s'econdQg'eeT 0nd. gearfrom theifir'st gear.

I Inffa, idevielbfthe character described; a;

sion on said second gear rotatable about the second extension; a thirdbearing supporting said tubular extension on said second extension; anda driving and supporting connection between said tubular connection andsaid second drum end wall connecting said second gear to the drum todrive the drum; and gearing connecting the first gear and the secondgear to drive the second gear from the first gear.

8. In a device of the type described, a motor having a shell and a shaftboth ends of which extend from the shell, a first extension on one ;sideof said shell, a first bearing on said first extension and concentricwith said shaft, a gearbox having a case, concentric and axially alignedinner and outer driven and driving shafts ex- :tending from one side ofthe gearbox case, a sec- -.ond extension on the other side of saidgearbox case, a second bearing on said second extension concentric withsaid shafts, said motor shaft beiing aligned with and having a drivingconnecttionjvjvith said inner driven gearbox shaft, a gear ltrain,between said driven and driving gearbox :shafts, and a drum surroundingsaid motor and :said gearbox case and having opposite end walls carriedon said first and second bearings and a centjer'wall driven by saidouter driving gearbox shaft.

9.;In a device of the type described, a motor having a shell includingan extension, and a shaft opposite said extension; a gearbox having acase including an extension, and concentric high-speed and low-speedshafts opposite' said extension, all said shafts and said extensionsbeing in alignment and the inner gearbox shaft being driven by the motorshaft; a drum surrounding said motor and said gearbox case and having acenter and two end walls, said end walls being carried by bearings onsaid extensions, said center wall being driven by the outer of saidgearbox shafts, and said drum and end walls completely surrounding andenclosing said motor and gearbox.

10. In a power terminal of the type described, a prime mover having adriving shaft and a casing, a first extension on the casing concentricwith said shaft, a reduction gearbox having a casing and an input shaft,a second extension on said gearbox casing concentric with said inputshaft, said gearbox including a countershaft,'an output shaft concentricwith said input shaft, meshed gears on said input, output, andcountershafts constituting a driving connection between the input and outputshafts, and said input and output shafts each extending from saidgearbox casing opposite said extension thereof, a coaxial drivingconnection between said prime mover shaft and said input shaft, a. drumsurrounding said prime mover and said gearbox and having end walls,bearings carrying said end walls on said extensions, a center wall insaid drum between said prime mover and said gearbox, and a drivingconnection between said output shaft and said center wall.

11. In a device of the character described, a prime mover having acasing and a rotatable shaft, a base, a first bracket on the base, meansmounting said prime mover casing fixedly in said first bracket, a firstbearing mounted on said prime mover casing, a speed change device havinga' casing and a rotatable shaft slidably en gagedin coaxial alignmentwith said prime mover shaft, a second bracket on said base, meansmounting said speed change device casing fixedly in said second bracket.a second bearing mounted on said speed change device casing, a drumsurrounding said prime mover and said speed change device and positionedcoaxially with respect to said shafts and having a first and a secondend wall supported respectively on said first and said second bearings,and means connecting said drum to said speed change device for drivingby said change device.

12. In a device of the character described, a prime mover having acasing and a first rotatable shaft, a base, a first bracket on the base,means mounting said prime mover casing fixedly in said first bracket, afirst bearing mounted on said prime mover casing, a speed change devicehaving a casing and a second rotatable shaft detachably engaged with andin coaxial alignment with said prime mover shaft, a second bracket onsaid base, means mounting said speed change device casing fixedly insaid second bracket, a second bearing mounted on said speed change,device casing, a drum surrounding said prime mover and said speed changedevice and positioned coaxially with respect to said shafts and having afirst and a second end wall supported respectively on said first andsaid second bearings, a, third wall mounted internally of said drum andhaving 'a tubular extension extending therefrom in coaxial alignmentwith said driving the extension from the second shaft.

13. In a device of the character described, a

prime mover having a casing and a first rotat- I able shaft, a base, afirst bracket on the base, means mounting said prime mover casingfixedly in said first bracket, a first bearing mounted on said primemover casing, a speed change device having a casing and a secondrotatable shaft slidably engaged in coaxial alignment with said primemover shaft, a second bracket on said base, means mounting said speedchange device casing fixedly in said second bracket, 2, second bearingmounted onsaid speed change device casing, a drum surrounding said primemover and said speed change device and positioned coaxially with respectto said shafts and having a first and a second end wall supportedrespectively on said first and said second bearings, a third wallmounted internally of said drum, acountershaft in said speed changedevice casing, a tubular extension on said third wall coaxial with saidfirst and second shafts, and gear means on said second shaft, thecountershaft and the tubular extension for driving the drum.

14. In a device of the character described, a prime mover having acasing and a first rotat- 1 mounted on said prime mover casing, a speedchange device having a casing and a second robearings and a third wallintermediate the ends 7 prime mover and said speed change device andpositioned coaxially with respect to said shafts and having a first anda second end wall supportedrespectively on said first and said second ofthe drum, a bearing in said third wall for supportingthe other end ofthe prime mover shaft,

and gear meanson said' second shaft and on saidythird wall fordrivingthe drum from the prime mover shaft. k

15.. In a device of the character described, a prime mover having acasing and a rotatable shaft, a base, a first bracket on the base, meansmounting said prime mover casing fixedly in said first bracket, a firstbearing mounted on said prime mover casing, a speed change device havinga. casing and a rotatable shaft slidably engaged in coaxial alignmentwith said prime mover shaft, a second bracket on said base, meansmounting said speed change device casing fixedly in said second bracket,a second bearing mounted on said speed change device casing, a drumpositioned coaxially with respect to said shafts and having a first anda second end wall supported respectively on said first and said secondbearings, means connecting said drum to said. speed change device fordriving by said change device, said speed change casing including a tubeextending downwardly and in threaded engagement with the casing toprovide a closure for adrain opening in the casing, said tube being opento the casing to admit oil from the casing into the tube.

16. In combination, a drum having a wall intermediate the ends thereof,said wall having a tubular extension thereon coaxial with the drum and..extending toward an end of the drum, a first end wall at one end ofthe drum, a second end wall at the other end of the drum, a base, amotorhaving a casing supported fixedly at one end on the base, a shaftin said motor, a first bearing in said intermediate wall supporting anend of said motor shaft, a speed change device having a casing supportedfixedly at one end of the base, a slidably detachable driving connectionbetween the speed change device and the motor shaft, a second bearing onsaid motor casing supporting said first end wall for rotation, a thirdbearing on said speed change'de vice casing supporting said second endwall for rotation, and a fourth bearing on said tubular extension forsupporting saidspeed change 'device casing. V

17. In combination, a drum having a-wall intermediate the ends thereof,said wall having-a tubular extension thereon coaxial with the drum andextending toward an end of the drum, a firstend wall at one end vo-fthedrum, a second end wall at the other end of .theldrum, a base, a motorvhaving a casing supported fixedly at one end of the base, a shaft insaid motor, afirst bearing in said intermediate wall supporting an endof said motor shaft, a speed change devicehaving a casing supportedfixedly at one end on the base, a slideably detachable drivingconnection be- I tween the speed change device and the motor shaft,

a second bearing on said motor casing'supporting said first end Wall forrotation, a'third bearing on said speed change. device casingsupportingsaid second end wall for rotation, a gear on said tubular extension, anda chain of. gears including a gear driven by themotor shaft for drivingthe gear on the tubular extension.

18. In combination, a drum having .a wall in-i termediate the endsthereof, said wall having a tubular extension thereon coaxialwith thedrum and extending toward an end of the drum, .a

first end wall atone end of the drum, a second end wall at the other endof the drum, a base,

a motor having a casing supported fixedly at one endon the base, a shaftin said motor, a

first bearing in said intermediate wall supporting an end of said motorshaft, a speed change 'j device having a casing supported fixedlyat oneI?" end on the base, a second bearing on saidmotor, casing supportingsaid first end wall "rbr rota tion, a third b'earing'on saidspeed change"dcvice casing supporting said second'end wall for rotation, a fourthbearing on said tubular e'x-"' tension for supporting said speed changedevice casing, av countershaft supported 'for' rotation inf" said speedchange device casing, a second shaft extending through said tubularextension, and; engaged with said motor shaft for driving byjj}, saidmotor shaft, a first gear'on said second shaft, a second gear on saidtubular extension, '{j' and gearing on said counter-shaft for drivingthe second gear from the first gear. I

19. In'a device of'the character described; a, prime mover including acasing having a first 1; extension thereon; a speed changeunit mend; inga casing having a second extension thereon; a drive shaft in the primemover extending operatively into the speed change unit casing: a firstgear in saidspeed change unit casing and driven by said drive shaft;means fixedly" supporting the first and the second extensions; a drumhaving a first and a second end walli a first bearing mounting the firstend wall 0b,. l the first extension; a second bearingmounting the secondend wallon the second extension) the first and the second extensions,the first and 1., the second bearings and the drum being coaxialwith theprime mover drive shaft; an annular T 'I gear coaxial with the prime,mover drive shaft; an annular sleeve connecting said, annularg'earl."to the drum to drive the drum and gearing coni" necting the first gearand the annular gear to drive the annular gear from the first gear.

20. In a device of the'cha'ract er described; a prime mover including acasing having a firstv extension thereon and a drive shaft; a speedchange unit including a casing having a second extension thereon; adrive shaft in the prime mover extending operatively into the speed,change unit casing; a first gear in said speed change unit casing anddriven by said drive shaft; means fixedly supporting the first and thesecondextensions; a drum having a first and a second end wall; a,,firstbearing mounting the first end wall on the first extension; a secondbearing mounting the second end wall on. the second extension; the firstand the second extensions, the first and the secondbearings and the drumbeing coaxial with the. prime mover drive shaft; a tubular gear coaxialwith the .f prime mover drive shaft; a tubular member 00-, axial withthe drive shaft and secured to saidtubular gear and to the drum toconnect said. tubular gear to the ,drumto drive the drum; an.d gearingconnecting the first gear and the tubue lar gear to drive the tubulargear from the first gear. i l

JOSEPH D. CHRISTIAN.

REFERENCES CITED The following references are of record in the file ofthis patent; V

UNITED STATES: l ATliINTS Date

